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  1. By: Wallis, Cliff. - Wershler, Cleve R. - Alberta. Alberta Energy and Natural Resources. - Cottonwood Consultants Ltd.
    Publication info: Edmonton, Alta, Alberta Energy and Natural Resources, 1985
    Holding Institution: University of Alberta Library
  2. By: Wallis, Cliff. - Wershler, Cleve R. - Alberta. Alberta Environment. Natural Resources Service. - Cottonwood Consultants Ltd.
    Publication info: Calgary, Cottonwood Consultants Ltd, 2001
    Holding Institution: University of Alberta Library
  1. By: Kondla, Norbert G. - Pinel, Harold W., - Wallis, Cliff. - Wershler, Cleve R.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 87
    Issue: 4
    Date: 1973
    Page Range: 377--393
    Publication Info: Ottawa Ottawa Field-Naturalists' Club